Holley 

Holley Inc designs, manufactures, and distributes high-performance automotive aftermarket products to car and truck enthusiasts in the United States, Canada and Europe. It manufactures a diversified line of performance automotive products, including carburetors, fuel pumps, fuel injection systems, nitrous oxide injection systems, superchargers, exhaust headers, mufflers, distributors, ignition components, engine tuners and automotive performance plumbing products. It also manufactures exhaust products as well as shifters, converters, transmission kits, transmissions, tuners and automotive software. The company markets its products under brands such as Holley, Holley EFI, MSD, Simpson, Flowmaster, EDGE, Cataclean, and Accel, among others. It operates in single segment.